Unreal Engine is a powerful and versatile development software and application created by Epic Games. It is a complete suite of game development tools designed to meet the needs of both novice and professional developers. It supports a wide range of platforms, including PC, console, mobile, virtual reality, and augmented reality. Unreal Engine is a powerful tool for creating high-fidelity 3D interactive experiences, from games to virtual reality simulations and more. It provides a comprehensive set of features and components to create stunning visuals, realistic physics and animation, complex AI and an intuitive workflow. It also includes powerful debugging and optimization tools, and integrated source control.
Open source, powerful, same rendering technology in 3.0, and did I mention open source and easy and open source?